Saint Peter Port
Guernsey
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Saint Peter Port, Guernsey

A calm sunny day in Saint Peter Port, Guernsey, with ships docked at the harbor, and a clear skyline in the horizon
A calm sunny day in Saint Peter Port, Guernsey, with ships docked at the harbor, and a clear skyline in the horizon
The last month of the summer, August, is an agreeable month in Saint Peter Port, Guernsey, with average temperature ranging between min 14°C (57.2°F) and max 20°C (68°F).

Temperature

The warmest month is August, with an average high-temperature of 20°C (68°F) and an average low-temperature of 14°C (57.2°F).

Rainfall

In August, the rain falls for 11 days. Throughout August, 45mm (1.8") of precipitation is accumulated. Throughout the year, in Saint Peter Port, Guernsey, there are 175 rainfall days, and 799mm (31.5") of precipitation is accumulated.

Sea temperature

August is the month with the warmest seawater in Saint Peter Port, with an average sea temperature of 17°C (62.6°F).
Note: For swimming, a surface water temperature of 17°C (62.6°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

In Saint Peter Port, the average length of the day in August is 14.4h.

Sunshine

In August, the average sunshine in Saint Peter Port, Guernsey, is 7h.

UV index

The average daily maximum UV index in Saint Peter Port is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the warmest month in Saint Peter Port?

The warmest month in Saint Peter Port, Guernsey, is August, with an average high-temperature of 20°C (68°F) and an average low-temperature of 14°C (57.2°F).

What is the temperature in August in Saint Peter Port?

In Saint Peter Port, in August, the average high-temperature is 20°C (68°F), and the average low-temperature is 14°C (57.2°F).

How many days does it rain in August in Saint Peter Port?

In August, in Saint Peter Port, the rain falls for 11 days. Throughout August, 45mm (1.8") of precipitation is accumulated.

When is the sea warmest in Saint Peter Port?

The month with the warmest seawater in Saint Peter Port, Guernsey, is August, with an average sea temperature of 17°C (62.6°F).

What is the sea temperature in August in Saint Peter Port?

In Saint Peter Port, Guernsey, in August, the average water temperature is 17°C (62.6°F). For swimming, a surface water temperature of 17°C (62.6°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

What is the average length of the day in August in Saint Peter Port?

The average length of the day in August in Saint Peter Port is 14.4h.

How many hours of sunshine does Saint Peter Port have in August?

In Saint Peter Port, the average sunshine in August is 7h.

What is the UV index intensity in August in Saint Peter Port?

The average daily maximum UV index in August in Saint Peter Port, Guernsey, is 6. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation.
Average temperature in August - Saint Peter Port, Guernsey
  • Average high temperature in August: 20°C

The warmest month (with the highest average high temperature) is August (20°C).
The month with the lowest average high temperature is February (8°C).

  • Average low temperature in August: 14°C

The month with the highest average low temperature is August (14°C).
The coldest month (with the lowest average low temperature) is February (4°C).

Average rainfall in August - Saint Peter Port, Guernsey
  • Average rainfall in August: 45mm

The wettest month (with the highest rainfall) is December (100mm).
The driest month (with the lowest rainfall) is July (37mm).

Average rainfall days in August - Saint Peter Port, Guernsey
  • Average rainfall days in August: 11 days

The month with the highest number of rainy days is January (20 days).
The month with the lowest number of rainy days is July (10 days).

Average sea temperature in August - Saint Peter Port, Guernsey
  • Average sea temperature in August: 17°C

The best month for swimming (with the highest average sea temperature) is August (17°C).
Coldest months (with the lowest average sea temperature) are February and March (9°C).

Average daylight in August / Average sunshine in August - Saint Peter Port, Guernsey
  • Average daylight in August: 14.4h

The month with the longest days is June (Average daylight: 16.2h).
The month with shortest days is December (Average daylight: 8.3h).

  • Average sunshine in August: 7h

Months with most sunshine are May, June and July (Average sunshine: 8h).
Months with least sunshine are January, November and December (Average sunshine: 2).

Average UV index in August - Saint Peter Port, Guernsey
  • Average UV index in August: 6

Months with the highest UV index are June and July (UV index 7).
Months with the lowest UV index are January, November and December (UV index 1).